【摘要】 研究了萃取温度、压力、时间、CO2 流量和超声参数对超声强化超临界流体萃取海藻EPA和DHA的影响 .发现与超临界流体萃取相比 ,超声强化超临界流体萃取过程使CO2 流量减小 ,萃取温度及压力降低 ,萃取时间缩短 ,而EPA和DHA的萃取率提高 .在单因素实验的基础上进行了正交实验 .结果表明 ,超声强化超临界流体萃取EPA和DHA的最佳工艺条件为 :萃取温度 35℃ ,压力 2 5MPa ,时间 3.0h ,CO2 流量 3L/h .更多还原

【Abstract】 Factors affecting the ultrasonically-enhanced supercritical fluid extraction (USFE) of EPA and DHA from algae were studied, including the temperature, pressure and time of the extraction, CO 2 flowrate and ultrasonic parameters. Compared with supercritical fluid extraction (SFE), USFE makes CO 2 flowrate and the temperature, pressure and time of the extraction decrease, while the extration yields of EPA and DHA increase. On the basis of single-factor experiments, an orthogonal experiment was carried out. The results indicate that the extraction undertaken at the extraction temperature of 35 ℃ and the pressure of 25 MPa for a extraction time of 3.0 h and with a CO 2 flowrate of 3 L/h is the optimum technology approach to extract EPA and DHA by USFE.更多还原